The white PRO 400 over-ear, closed back headphones incorporate 50mm dynamic drivers featuring neodymium magnets that provide maximum efficiency when used with mobile devices. The reinforced headband with ample padding and soft earpads offer excellent acoustic properties and can fold into a compact size and come with a semi-rigid carrying case & cleaning cloth. Includes two tangle-resistant flat cables: a 4-foot cable with in-line remote and microphone optimized for use with iOS devices and can control volume for music and phone calls, play/pause music, skip back and forth, and answer/end phone calls, and a 10-foot miniplug cable. 20-20,000 Hz frequency response; 106 dB sensitivity, 23 ohms impedance and 1 year warranty.